If the issue is OTP verification, I would suspect it is an issue from your bank. And I would recommend you reach out to the bank.
However, you can also reach out to billing support with case details so you can get support regarding this here: https://azure.microsoft.com/en-us/support/create-ticketBilling tickets are free so you would not be charged.
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola